Internal combustion engine



April 1932- L. M. DODAMEAD 1,852,958

INTERNAL COMBUSTION ENG INE .Filed June 20, 1929 6 Sheets-Sheet llNVENTOR WITNESS 7 L.M,Doc[nmao ATTORNEY April 1932. M. DODAMEAD1,852,958

I NTERNAL COMBUSTION ENGINE Filed June 20, 1929 6 Sheets-Sheet 2INVENTOR WiTNESS 1, .12 flodam mmaa.

ATTORNEY Aprils, 1932. I M. D-ODAMEAD INTERNAL COMBUSTION ENGINE FiledJune 20, 1929 6 Sheets-Sheet 3 ATTORNEY April 5, 1932. L. M DODAMEADINTERNAL COMBUSTION ENGINE Filed June 20, 1929 6 Sheets-Sheet 4 INVENTORl dlladnueazi WITNESS qmsedzw fi ATTORNEY April 5, 1932.

L. M DODAMEAD INTERNAL COMBUSTION ENGINE Filed June 20, 1929 ATTORNEY6Sheets-Sheet 5 April5, 1932. M. DODAMEAD INTERNAL COMBUSTION ENGINEFiled June 20, 1929 6 Sheets-Sheet 6 M x. 152% Eg INVENTOR ATTORNEY w.as A; Lg 4 Sill-2::

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7 p UMQED sr Patented Apr. 5 1932 .aLLOYI) MQDODAMEAQOF' NORFOLK,VIRGINIA INTERNAL COMBUSTION ENGINE Application filed June 20,

- My invention relates to internal combustion enginesand moreparticularly to those of the rotary sleevevalve type.

An objectof the present invention is toprovide alight, comparativelysilent air-cooledv engine which is positive in operation and whichreduces the number of small moving parts to a minimum.

Further the invention provides an air cooling system embodying a hoodwhich embraces the usual fan and upper part of the motor and Anadditional object of the invention resides in the provision of alubrication system wherein the valve casing is provlded with a mainlubricant bore having communication with the interior of the casing atvarious points to supply lubricant to the valve and leads to otherrotatable parts of the engine such as the generator gearing.

With the precedingand other objects and advantages in mind, theinvention consists in the novel combination of elements, constructionsand arrangements of parts and operationsto be hereinafter more fullydescribed, claimed and illustrated in the accompanying drawings,wherein:

Figure 1 is .an end elevation of an internal combustion engineconstructed in accordance with my invention;

Fig.2 is a side elevation'of the same; and showing half of the coolingor ventilating hood removed;

*Fig. 3 isa vertical sectional view taken on the line -3-3 of Fig. 2;

" Fig.,4t is a fragmentarydetail viewpartly in elevation and partlyinsection;

. Fig.5 is a horizontal sectional view taken on substantially the line55 of Fig. 4;

6 is an elevation ofthe rotary valve embodied in the invention;

- Fig.7 is a vertical sectiontaken on substantially the line7"7 of Fig.2; Fig. 8 is a similar view taken on'line 8-8 of Fig. 25

1929. Serial mevaasr;

Fig. 9 is an enlarged fragmentary longi-. I

tudinally sectional view of the valve and surrounding valve casing;

Fig. 10 is a fragmentarybottom plan view of the valve casing; and

Fig. 11 is an enlarged detail view illustrat mg the fan belt adprstmgmeans.

Referring to the invention in detail aninternal combustion engine havingvertical cylinders 5 in which reciprocatory pistons 6 arearranged isprovided. Extending longitudi- I nally of the engine 'is'a circulartwo-part valve casing 7 the lower part of which is formed with arectangular plate 8 which is secured to the upper ends of the cylindersby suitable fastenings 9. A. hollow rotary valve 10 is rotatably mountedwithin the casing and is equipped with stub shafts 11 at its ends andwhich project laterally therefrom and are journaled in the end walls ofthe casing as at 12. At a point centrally of its ends the valveis'provided with a plurality of spaced inlet ports 13 to receivecombustible mixture from suitable carbureter. For eachcylinder 5 thevalve is provided with a'set of intake and exhaust ports designated atland- 15, respectively, and which are adapted to communicate withthecylinder 5 at predetermined times by way of intakes and exhaust openings16 and 1'? provided in the plate 8. Annular packing rings or ribs 18 areformed on the valve uponopposite sides of the port therein and arerevoluble in circumferential grooves formed upon the interior of thevalve casing. As particularly illustrated inFigs4 ing21 formed in theplate Sand communicating with one of the ports 15. Each two exhaustports 15 and 16 are diametrically opposed and are connected byarectangular conduit 20 extendingtransversely through the valve and isadapted to establish communication between exhausts outlets 21 in thevalve. casing and corresponding exhaust openings 17 in the plate 8 whenthe valve is in the position disclosed in Fig. 7 It will thus be seenthat each half revolution brings one of each pair of intake ports 14 and15 in registration with the corresponding intakes 16 in the plate 8 andthat the exhaust conduits reach exhaust position subsequent to eachclosing of one of these ports 14 and 15.

In order to supply combustible mixture to the rotary valve, the valvecasing is formed with a laterally extending hollow casting 22 at a pointin transverse alignment with the intakes 13. The outer end of thiscasting is adapted to be connected with a suitable carbureter. Itfollows that combustible mixture flowing into the hollow casting 22 willpass through the openings 13 and pass longitudinally through the valvein opposite directions and it is conducted to the various cylindersthrough the intake ports above referred to.

For the purpose of supplying lubricant to the rotatable valve one sideof the casing is formed with a longitudinally extending lubricant bore23 having lateral branches 2% which open into the grooves 1.9. At oneend of the valve casing a branch 25 extends from the bore 23 to one ofthe stub shafts 11. At its rear end the valve casing is formed with avertically extending bore 26 which communicates with the adjacent end ofthe bore 23 and opens into the upper end of a casing 27 in which theshaft 28 of a suitable primer 29 is mounted, the latter being driventhrough gearing 30. A gear housing 31 is arranged along the casing 27and housesithe gears 32 of a vertical generator 33. A drain pipe 34extends from the gear housing 31 through the crank case of the engineand con ducts all surplus lubricant from the rotatable parts in thecasings 26 and 31 back to the crank case.

The invention also provides a cooling or ventilating structure whichconsists of a horizontally arranged circular casing which extends theentire length of the engine and embraces the engine head and cylinders.This casing consists of semi-circular sections 35 having flanges 36 attheir ends which are secured together by transverse fastenings 37. Asparticularly illustrated in Fig. 2 the forward end of the casing is openand is of such diameter as to receive the usual ventilating fan 37awhich is driven from a fan belt 38. The rear ends of the sections havedepending vertical portions 39 which are curved laterally toward eachother to hold the casing at this end. The casing is supported on theenginebyaninverted V-shaped bracket 38 which is mounted on and arisesfrom the forward end of the valve casing and has its upper end securedbetween the flanges 36. The lower longitudinal edges of the sectionsextend a considerable distance along the upper ends of the cylinders andare secured to the latter by transverse bolts 40 passing between thecylinders and engaged with the opposed portions of the sections.

In order to distribute the air passing rearwardly in the casing from thevan to the various cylinders a plurality of circular concavo-convex airdeflectors 41 is provided. These deflectors 41 are graduated in diameterand are arranged with the smallest one adjacent the frame. Each airdeflector is positioned between two adjacent cylinders and has aneccentric opening which receives the valve casing. The lower end of eachof these distributors is formed with a pair of depending side wings 42extending down along the opposite sides of its corresponding cylinder inspaced relation thereto as disclosed in Fig. 1. The lower ends of theseside wings are attached to the engine block by transverse fastenings 43.Inasmuch as the deflectors are of graduated diameters some of the airfrom the fan 37 will strike each of the deflectors and be dischargeddownwardly around the cylinders. To further aid the cooling of theengine the valve casing is formed with circumferential cooling fins 4-5and the cylinders are provided with similar fins 46.

An exhaust manifold 47 is arranged upon the upper section of the valvecasing and communicates with the exhaust ports therein. Longitudinallyaligned openings 47a are provided in the deflectors through which theexhaust manifold 47 extends.

With reference to the cooling or ventilating system it follows that theair drawn into the forward end of the casing 35 is carried rearwardly tothe casing where it strikes the deflectors 41. By reason of the dishedor concave configuration of the deflectors the air is deflecteddownwardly over the respective cylinders.

lVhat is claimed is:

1. In an air cooling apparatus for internal combustion engines, a casingto embrace the upper portion of an engine, a plurality of verticallydisposed substantially circular deflectors of concavo-convex crosssection of graduated diameters supported on said engine within thecasing, each of said deflectors having a cut out portion for the recetion of the upper portion of said engine an having depending wingportions formed at either side of said out out portion for straddlingsaid engine, and fastening means extending through said wing portions.

2. A cooling device for internal combustion engines comprising avertically disposed substantially circular concave-convex member airdeflector adapted to be supported on the upper portion of an internalcombustion engine with its convex face facing forwardly, and a pair ofdepending attaching flanges formed on the lower edge of the deflector,ar-

ranged on either side of said engine and adapted to be detachablysecured to the en-c gine block.

3; As an article of manufacture, a cooling attachment forinternalconibustion engines comprising a substantially circular dishshaped memberhaving a cut out portion at one side thereof, and extendingwing portions formed at either side of sa1d cut out portion. 7 c

4. In an air cooling apparatus for internal combustion engines, a casingenclosing the upper portion of said engine and forming a passagetherearound, and a plurality of vertically disposed deflector platesmounted upon said engine within said passage, said reflector plates hangof increasing area from the front to the rear of said engine and havingdepending side wings extending downwardly at each side of said engine.

5; In an air cooling apparatus for internal combustion engines havinglongitudinally arranged cylinders, an elongated casing enclosmg saidcylinders and forming an air passage therearound, said casing being openat the 7 forward end and partially closed at the rearward end fordeflecting air downwardly over the rear end of said engine, and aplurality of longitudinally spaced vertically disposed deflector platesmounted upon said engine of an internal combustion engine and to form alongitudinally extending air passage therearound, a plurality ofupstanding concavoconvex air deflecting members supported on said enginein longitudinally spaced relation within said casing, said airdeflecting members being of graduated diameters and arranged with thesmallest member adjacent the forward end of said casing, each of saidair deflecting members having a wing depending from the lower edgethereof at each side of said engine, said wings being disposed betweenadjacent cylinders of said engine.

LLOYD M. DODAMEAD

